System Sensor EOLR-1 End-of-Line Supervision Relay

The System Sensor EOLR-1 is an epoxy-encapsulated, normally open SPST relay used to supervise external power at the end of a compatible fire-alarm initiating-device circuit. A common application is monitoring power supplied to four-wire smoke or heat detectors.

Key specifications

• 940 VDC operating range
• 20 mA maximum operating current
• Normally open SPST relay
• Potted construction with pigtail leads
• Operating temperature range of -22F to 140F
• Designed for end-of-line power supervision applications

Life-safety installation requirements

The EOLR-1 is a supervision relay, not a substitute for the circuit’s required end-of-line resistor. Location, wiring, voltage, panel compatibility and initiating-device listing must follow the approved system design and manufacturer instructions. Installation and testing should be performed by qualified fire-alarm personnel.

Licensed fire-alarm support in Texas

Avenger Security provides licensed fire-alarm design, installation, testing and service throughout Austin, Central Texas and statewide. Life-safety equipment must be installed and tested in accordance with the approved system design, manufacturer instructions and applicable codes. New clients considering new service can request a no-cost onsite visit and up to one hour of initial consultation. Existing troubleshooting, diagnostics and repair are billable services.